Nanotechnology News and Discussions

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Nanotechnology breakthrough: A single-molecule valve

15th May 2023

A breakthrough in nanoscale control of fluids has been demonstrated by Osaka Metropolitan University, Japan.

[...]

The team also discovered that when they trapped single fluorescent (dyed) molecules in the nanospace inside the valve, the fluorescence of the single molecules became brighter. This happened because the small space made it harder for single molecules to move around randomly.

Professor Yan Xu, who led the study, explains that "this effect of fluorescence signal amplification could help with detecting very small amounts of pathogens for early diagnosis of diseases such as cancers and Parkinson's, without requiring expensive equipment."

This breakthrough has the potential to be useful in many other ways – "its applications are limitless," according to Xu's team. It could help in developing personalised medicines for rare diseases, or creating better displays and batteries, for example. It could be a significant step towards freely assembling materials using single molecules as building blocks in solution.

Read more: https://www.futuretimeline.net/blog/202 ... -valve.htm


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Researchers demonstrate electrical creation and control of antiferromagnetic vortices
https://phys.org/news/2023-05-electrica ... tices.html
by Jane Icke, University of Nottingham
A new study has shown for the first time how electrical creation and control of magnetic vortices in an antiferromagnet can be achieved, a discovery that will increase the data storage capacity and speed of next generation devices.

Researchers from the University of Nottingham's School of Physics and Astronomy have used magnetic imaging techniques to map the structure of newly formed magnetic vortices and demonstrate their back-and-forth movement due to alternating electrical pulses. Their findings have been published in Nature Nanotechnology.

"This is an exciting moment for us, these magnetic vortices have been proposed as information carriers in next-generation memory devices, but evidence of their existence in antiferromagnets has so far been scarce. Now, we have not only generated them, but also moved them in a controllable way. It's another success for our material, CuMnAs, which has been at the center of several breakthroughs in antiferromagnetic spintronics over the last few years," says Oliver Amin.

CuMnAs has a specific crystal structure, grown in almost complete vacuum, atomic layer by atomic layer. It has been shown to behave like a switch when pulsed with electrical currents, and the research group in Nottingham, led by Dr. Peter Wadley, alongside international collaborators, have "zoomed in" on the magnetic textures being controlled; first with the demonstration of moving domain walls, and now with the generation and control of magnetic vortices.
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Researchers report technique to fabricate nanosheets in one minute
https://phys.org/news/2023-05-technique ... inute.html
by Nagoya University

A research group led by Professor Minoru Osada (he, him) and postdoctoral researcher Yue Shi (she, her) at the Institute for Future Materials and Systems (IMaSS), Nagoya University in Japan, has developed a new technology to fabricate nanosheets, thin films of two-dimensional materials a couple of nanometers thick, in about one minute.

This technology enables the formation of high-quality, large nanosheet films with a single click without the need for specialized knowledge or technology. Their findings are expected to contribute to developing the industrial manufacturing process for various types of nanosheet devices. The study was published in ACS Applied Materials & Interfaces.
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Chemists develop ferromagnetic single-atom spin catalyst for boosting water splitting reactions
https://phys.org/news/2023-05-chemists- ... sting.html
by National University of Singapore
Chemists from the National University of Singapore (NUS) have developed a scalable hydrothermal approach for obtaining ferromagnetic single-atom spin catalysts which can boost the efficiency of water splitting reactions under the influence of a magnetic field.

Electrolysis of water using renewable resources is a promising technology for hydrogen production and is having a growing interest worldwide. This is because hydrogen is seen as a promising alternative to address the increasing concerns over carbon emissions from fossil fuels that can cause climate change.

However, hydrogen production via water electrolysis is primarily limited by the sluggish kinetics of an associated process known as the oxygen evolution reaction (OER). Precious metal based electrocatalysts are often used in the OER process to improve its poor efficiency. A pioneering class of catalytic materials known as heterogeneous ferromagnetic single-atom spin catalysts (SASCs), when used together with an applied magnetic field has great potential to accelerate this chemical reaction.
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Engineering designer materials with bird-inspired structural colors using nanoparticle-based supraballs
https://phys.org/news/2023-05-materials ... balls.html
by Thamarasee Jeewandara , Phys.org
Materials scientists are often bioinspired, and in a new study, bird-inspired by structural colors exhibited by avian species to form non-iridescent nanoparticle assemblies. Such nanoparticle mixtures varying in particle chemistry and size can affect the color produced to identify structure-color relationships and create designer materials with tailored color.

In a new report on Science Advances, Christian M. Heil, and a research team at several international, multidisciplinary research institutes in the U.S., Belgium, and Germany, showed how to reconstruct the assembled structures via small-angle scattering measurements.

The research team successfully and quantitatively predicted the experimentally observed colors in mixtures with strongly absorbed nanoparticles to demonstrate the influence of a single layer of segregated nanoparticles and produce a color of interest. The versatile computational approaches integrated in this work were useful to engineer synthetic materials with desired colors suited for paints, cosmetics, and food coloring applications.
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Quite telling this is the sub with the lowest activity https://time.com/4068125/nanotech-sector/
I don't think people would have predicted this when engines of creation was released
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lechwall wrote: Fri Jun 23, 2023 5:55 pm Quite telling this is the sub with the lowest activity https://time.com/4068125/nanotech-sector/
I don't think people would have predicted this when engines of creation was released
We are still far from flying micro-machines.
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Tiny nanopores can contribute to faster identification of diseases

June 15, 2023

In a collaboration with Groningen University, Professor Jørgen Kjems and his research group at Aarhus University have achieved a remarkable breakthrough in developing tiny nano-sized pores that can contribute to better possibilities for, among other things, detecting diseases at an earlier stage.

Their work, recently published in the journal ACS Nano, shows a new innovative method for finding specific proteins in complex biological fluids, such as blood, without having to label the proteins chemically. The research is an important milestone in nanopore technology, and could revolutionize medical diagnostics.

Nanopores are tiny channels formed in materials, that can be used as sensors. The researchers, led by Jørgen Kjems and Giovanni Maglia (Groningen Univ.), have taken this a step further by developing a special type of nanopore called ClyA with scanner molecules, called nanobodies, attached to it.

These nanobodies, derived from antibodies, are capable of recognizing different proteins with astonishing accuracy. In this study, the researchers attached nanobodies to ClyA, using a DNA adapter. By using a series of nanobodies, they were able to create many different nanopore sensors, which could detect a variety of proteins of different sizes.

https://phys.org/news/2023-06-tiny-nano ... ation.html


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Hyundai Motor unveils nanotechnology vision

Jul 20, 2023 - 15:15

Hyundai Motor Group said Thursday it has developed six kinds of nanotechnologies that will be key drivers of growth in future mobility, ranging from autonomous driving cars to software defined vehicles.

Nanotechnology creates new materials by synthesizing or fabricate arrays of materials that are 1 billionth of a meter in width.

“Only when we secure top level materials technology in mobility can we improve the performance and durability of car parts and vehicles which will offer a competitive edge in the fast-evolving future mobility market,” said Lee Jong-soo, vice president of the institute of advanced technology development at Hyundai Motor Group, during a press conference in Seoul.

The first nanotechnology material presented by the company was self-healing polymer coating, which removes scratches or water from cameras and lidar sensors on self-driving cars.

Based on multiple sets of self-healing mechanisms, unlike a one-off chemical reaction, it can constantly help the car to restore its detecting device, spotting obstacles or pedestrians on roads more accurately, according to Yeo In-hong, a researcher at institute of advanced technology development at Hyundai Motor Group.

http://www.koreaherald.com/view.php?ud=20230720000598
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Researchers demonstrate scaling of aligned carbon nanotube transistors to below sub-10 nm nodes
https://phys.org/news/2023-07-scaling-a ... stors.html
by Ingrid Fadelli , Phys.org

Carbon nanotubes, large cylindrical molecules composed of hybridized carbon atoms arranged in a hexagonal structure, recently attracted significant attention among electronics engineers. Due to their geometric configuration and advantageous electronic properties, these unique molecules could be used to create smaller field-effect transistors (FETs) that exhibit high energy efficiencies.

FETs based on carbon nanotubes have the potential to outperform smaller transistors based on silicon, yet their advantage in real-world implementations has yet to be conclusively demonstrated. A recent paper by researchers at Peking University and other institutes in China, published in Nature Electronics, outlines the realization of FETs based on carbon nanotubes that can be scaled to the same size of a 10 nm silicon technology node.
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